package three;

import java.util.Scanner;

public class n3 {
	private static Scanner scn;

	public static void main(String[] args) {
		int n = 0;
		scn = new Scanner(System.in);
		n = scn.nextInt();
		int[] a = new int[n];
		for (int i = 0; i < n; i++) {
			a[i]= i+1;	
			System.out.print(a[i] + " ");
		}
		System.out.println(avg(n, a));
	}

	private static double avg(int n, int[] i) {
		double m = 0;
		for (int j = 0; j < n; j++) {
			m = m + i[j];			
		}
		double sr = m/n;
		return sr;
	}

}

